How can you set up a slackline where you are? If you already know how to set up a line but are having troubles finding good anchors, read on. Hopefully this guide will help you out. Obviously you’ll need an anchor for each end of the line. Using a tree on each end is easiest. But if you only have one tree or none at all you’ll have to do a little more work. Well, here are some examples of what you can use for anchors:
**Note: Anytime you are equalizing things like stakes, climbing protection, or bolts make sure you use 1-inch webbing or full strength climbing rope (preferably static) as a minimum to equalize. Furthermore, any part of your slackline set-up that contacts trees or rocks should be padded to prevent abrasion and/or to protect the tree. Use foam, carpet, or cardboard.
Tree: Tree anchors are easiest if your trees are the right distance apart. Simply protect the bark with cardboard or carpet and sling it with webbing. If your trees are too far apart consider anchoring to the base of one or both trees and using A-frames like the ones being used in the last for pictures on this page.
Rock ( w/ Slings): Run webbing around a boulder or rock projection as an anchor. Use this either directly to anchor the line or as an anchor behind an A-frame.
Rock (w/ Climbing Gear): Use climbing protection like stoppers, hexes, and cams to build an equalized anchor from a crack or series of cracks in the rock. Equalize with rope or webbing.
Rock (w/ Bolts): As a last resort rock climbing bolts can be drilled into a rock and equalized for an anchor point. Bolts should be placed so they are loaded in shear, not pulling straight out. Also, keep in mind drilling isn’t legal everywhere and some areas may have an ethic that forbids it. If you don’t know, don’t drill bolts.
Lawn: Drive stakes in the ground and equalize them with webbing for a good anchor. To equalize tie a loop at either end of a piece of webbing (~20 feet long shown here). Put one end-loop on each of the outside stakes. Loop the middle of the webbing behind the middle stake and pull the two big loops of webbing tight as your anchor point. Of course call Digger’s Hotline (or your state’s equivalent) before you put stakes in to avoid hitting a power line/phone line, etc.
Beach: Use 50-gallon garbage cans full of water or sand on pallets as anchors for A-frames. Run 3 tied loops of webbing (1 on each side, 1 in middle) through the gap between the top and bottom of the pallet and push a long 3+ inch diameter piece of wood though all three loops to anchor them. Equalize the loops with webbing/rope for your anchor. This can also be done with one continuous piece of webbing like is done for the stakes (Lawn: above) by tying a knot in each end of a long piece of webbing and threading it back and forth under the pallet and around the piece of wood.
Pavement (w/ Pallet): Anything heavy on a pallet will be a good anchor: sandbags, bricks/block, or 50-gallon garbage cans full of water. There is no set weight needed since it will depend on how slick the pavement is.